Lunar Elevator System

How about the methods I outlined in my post? Most are not used on
earth. Surely they must pack a lot of "work energy" to do the job.
Also, we wouldn't be faced with tailing having a negative effect on
the environment, disrupting animal migration patterns, etc.

Look beyond earth means and methods. The lunar surface and space
will allow new process to be used.

Which of the methods I proposed is the most likely, or is there
another way you'd chose to advocate?

> I have been busy, but I just have to respond to some comments;
About lunar
> synchronous orbit. Some folks say there is no such thing. But
Earth is in
> that orbit. There are libration points in such systems.
> And about moving lunar mountain tops. The civil engineering tasks
of
> removing mountain tops is mostly beyond our means on Earth, how
could we do
> it on the Moon?
> Jay Huebner
>
> Why 300,000 km ? Isn't the correct number 90,447 km ?
>
> Luna's mass is M=7.349E22 kg
> The gravitational constant is G=6.672E-11 N m^2 / kg^2
> The magnitude of the velocity vector in a circular orbit is v_circ
= sqrt
> ( mu / r ),
> where mu=G*M and r is the radius from the center of mass.
>
> So, for instance, the magnitude of the velocity vector of a
circular orbit
> at the Moon's surface is sqrt(mu/1.74E6) = 1679 m/s, where 1.74E6
is the
> radius of the moon in meters.
>
> The distance traveled in one orbit is 2*pi()*r, and the orbital
period is
> 2*pi()*r / v_circ.
>
> It takes the moon 28 and a quarter days to turn about its axis.
The
> value of r that equates the orbital period to 28.25 days is 90447
km, or
> 54268 miles.
>
> Is a tether 90447 km in length feasible?
>
> Ron
> ******
>
> "victoriatangoman"
> 04/03/02 02:46 AM
>
> > Ian Woollard wrote,
> >
> > "A fiber with a tensile of 73 Gpa exists; the required strength
> > is 72.5 Gpa. However, a) we need a safety factor b) we need to
> > be able to splice the fibers together, and in practice that
> > loses 15-30% of the strength."
> >
> > What is the required strength for a space elevator from the
Lunar
> surface
> > to lunar orbit?
> > Do currently-existing materials suffice to build such a lunar
> elevator?
> > Would a lunar elevator be a simpler technological solution to
the
> problem
> > of moving large amounts of material off the moon than the
O'Neill-
> heritage
> > mass driver/mass catcher system?
>
> ...
> A true lunar elevator would have to extend to greater than
> 300,000 km from the lunar surface to have the center of mass in a
> lunar synchronus orbit. Such a long fixed length is not
technically
> feasable because the distortions that would be caused by the
earth's